move all goldenfile tests from go into own files

.gitignore

@@ -10,3 +10,5 @@
 
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
+
+.DS_Store

commonmark_test.go

@@ -2,8 +2,12 @@ package md_test
 
 import (
 	"bytes"
+	"fmt"
 	"io/ioutil"
+	"os"
 	"path"
+	"path/filepath"
+	"strings"
 	"testing"
 
 	md "github.com/JohannesKaufmann/html-to-markdown"
@@ -13,13 +17,56 @@ import (
 )
 
 type GoldenTest struct {
-	Name string
+	Name   string
+	Domain string
 
 	Options map[string]*md.Options
 	Plugins []md.Plugin
 }
 
 func RunGoldenTest(t *testing.T, tests []GoldenTest) {
+	// loop through all test cases that were added manually
+	dirs := make(map[string]struct{})
+	for _, test := range tests {
+		name := test.Name
+		name = strings.Replace(name, " ", "_", -1)
+		dirs[name] = struct{}{}
+	}
+
+	// now add all tests that were found on disk to the tests slice
+	err := filepath.Walk(path.Join("testdata", t.Name()),
+		func(p string, info os.FileInfo, err error) error {
+			if err != nil {
+				return err
+			}
+			if !info.IsDir() {
+				return nil
+			}
+
+			// skip folders that don't contain an input.html file
+			if _, err := os.Stat(path.Join(p, "input.html")); os.IsNotExist(err) {
+				return nil
+			}
+
+			parts := strings.SplitN(p, string(os.PathSeparator), 3)
+			p = parts[2] // remove "testdata/TestCommonmark/" from "testdata/TestCommonmark/..."
+
+			_, ok := dirs[p]
+			if ok {
+				return nil
+			}
+
+			// add the folder from disk to the tests slice, since its not it there yet
+			tests = append(tests, GoldenTest{
+				Name: p,
+			})
+			return nil
+		})
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
 	for _, test := range tests {
 		if len(test.Options) == 0 {
 			test.Options = map[string]*md.Options{
@@ -28,6 +75,11 @@ func RunGoldenTest(t *testing.T, tests []GoldenTest) {
 		}
 
 		t.Run(test.Name, func(t *testing.T) {
+			if strings.Contains(t.Name(), "#") {
+				fmt.Println("the name", test.Name, t.Name(), "seems too be used for multiple tests")
+				return
+			}
+
 			g := goldie.New(t)
 
 			for key, options := range test.Options {
@@ -38,9 +90,11 @@ func RunGoldenTest(t *testing.T, tests []GoldenTest) {
 				input, err := ioutil.ReadFile(path.Join("testdata", p))
 				if err != nil {
 					t.Error(err)
+					return
 				}
 
-				conv := md.NewConverter("", true, options)
+				conv := md.NewConverter(test.Domain, true, options)
+				conv.Keep("keep-tag").Remove("remove-tag")
 				for _, plugin := range test.Plugins {
 					conv.Use(plugin)
 				}
@@ -70,73 +124,88 @@ func RunGoldenTest(t *testing.T, tests []GoldenTest) {
 func TestCommonmark(t *testing.T) {
 	var tests = []GoldenTest{
 		{
-			Name: "h1",
+			Name: "link",
 			Options: map[string]*md.Options{
-				"setext": {HeadingStyle: "setext"},
-				"atx":    {HeadingStyle: "atx"},
+				"inlined":              &md.Options{LinkStyle: "inlined"},
+				"referenced_full":      &md.Options{LinkStyle: "referenced", LinkReferenceStyle: "full"},
+				"referenced_collapsed": &md.Options{LinkStyle: "referenced", LinkReferenceStyle: "collapsed"},
+				"referenced_shortcut":  &md.Options{LinkStyle: "referenced", LinkReferenceStyle: "shortcut"},
 			},
 		},
 		{
-			Name: "h2",
+			Name: "heading",
 			Options: map[string]*md.Options{
-				"setext": {HeadingStyle: "setext"},
-				"atx":    {HeadingStyle: "atx"},
+				"atx":    &md.Options{HeadingStyle: "atx"},
+				"setext": &md.Options{HeadingStyle: "setext"},
 			},
 		},
 		{
-			Name: "h3",
+			Name: "italic",
 			Options: map[string]*md.Options{
-				"setext": {HeadingStyle: "setext"},
-				"atx":    {HeadingStyle: "atx"},
+				"asterisks":   &md.Options{EmDelimiter: "*"},
+				"underscores": &md.Options{EmDelimiter: "_"},
 			},
 		},
 		{
-			Name: "p with content",
-		},
-		{
-			Name: "p inside div",
+			Name: "bold",
+			Options: map[string]*md.Options{
+				"asterisks":   &md.Options{StrongDelimiter: "**"},
+				"underscores": &md.Options{StrongDelimiter: "__"},
+			},
 		},
 		{
-			Name: "p with span",
+			Name: "pre_code",
+			Options: map[string]*md.Options{
+				"indented":        &md.Options{CodeBlockStyle: "indented"},
+				"fenced_backtick": &md.Options{CodeBlockStyle: "fenced", Fence: "```"},
+				"fenced_tilde":    &md.Options{CodeBlockStyle: "fenced", Fence: "~~~"},
+			},
 		},
 		{
-			Name: "p with strong",
+			Name: "list",
 			Options: map[string]*md.Options{
-				"default":    {StrongDelimiter: ""},
-				"underscore": {StrongDelimiter: "__"},
+				"asterisks": &md.Options{BulletListMarker: "*"},
+				"dash":      &md.Options{BulletListMarker: "-"},
+				"plus":      &md.Options{BulletListMarker: "+"},
 			},
 		},
 		{
-			Name: "p with b",
+			Name: "list_nested",
+			Options: map[string]*md.Options{
+				"asterisks": &md.Options{BulletListMarker: "*"},
+				"dash":      &md.Options{BulletListMarker: "-"},
+				"plus":      &md.Options{BulletListMarker: "+"},
+			},
 		},
+		// + all the test on disk that are added automatically
 	}
 
 	RunGoldenTest(t, tests)
+}
 
-	/*
-
-		TestCommonmark
-		TestPlugins
-		TestRules/Keep/Remove
-
-		---- always start with the main tag
-
-
-		p with content
-
-		strong nested
-
-		h3
-
-		escape
-
-
-		---- files
-		h1.input
-
-		h1.setext.golden
-		h1.atx.golden
-
-
-	*/
+func TestRealWorld(t *testing.T) {
+	var tests = []GoldenTest{
+		{
+			Name:   "blog.golang.org",
+			Domain: "blog.golang.org",
+			Options: map[string]*md.Options{
+				"inlined":              &md.Options{LinkStyle: "inlined"},
+				"referenced_full":      &md.Options{LinkStyle: "referenced", LinkReferenceStyle: "full"},
+				"referenced_collapsed": &md.Options{LinkStyle: "referenced", LinkReferenceStyle: "collapsed"},
+				"referenced_shortcut":  &md.Options{LinkStyle: "referenced", LinkReferenceStyle: "shortcut"},
+				"emphasis_asterisks":   &md.Options{EmDelimiter: "*", StrongDelimiter: "**"},
+				"emphasis_underscores": &md.Options{EmDelimiter: "_", StrongDelimiter: "__"},
+			},
+		},
+		{
+			Name:   "golang.org",
+			Domain: "golang.org",
+		},
+		{
+			Name:   "bonnerruderverein.de",
+			Domain: "bonnerruderverein.de",
+		},
+		// + all the test on disk that are added automatically
+	}
+	RunGoldenTest(t, tests)
 }

from.go

@@ -355,7 +355,7 @@ func (c *Converter) ConvertURL(url string) (string, error) {
 	}
 	domain := DomainFromURL(url)
 	if c.domain != domain {
-		return "", errors.New("expected " + c.domain + " as the domain but got " + domain)
+		return "", fmt.Errorf("expected '%s' as the domain but got '%s'", c.domain, domain)
 	}
 	return c.Convert(doc.Selection), nil
 }